yii2中验证码的使用--图片不显示

来源：互联网发布：python使用手册编辑：程序博客网时间：2024/05/01 11:55

1.控制器中

public function actions()

{

return [

'captcha' => [

'class' => 'yii\captcha\CaptchaAction',

'fixedVerifyCode' => YII_ENV_TEST ? 'testme' : null,

];

}

2.模型中

要有一个验证码的字段$verifyCode

3.视图中

use yii\helpers\Html;
use yii\widgets\ActiveForm;
use yii\captcha\Captcha;

自动生成表单

页面中验证码代码

<?= $form->field($model, 'verifyCode')->widget(Captcha::className(), [
'template' => '<div class="row"><div class="col-lg-3">{image}</div><div class="col-lg-6">{input}</div></div>',
]) ?>

控制器中的权限可能导致验证码图片不显示，

public function behaviors()
    {
        return [
            'access' => [
                'class' => AccessControl::className(),
                'only' => ['logout', 'signup','login'],
                'rules' => [
                    [
                        'actions' => ['signup'],
                        'allow' => true,
                        'roles' => ['?'],
                    ],
                    [
                        'actions' => ['logout'],
                        'allow' => true,
                        'roles' => ['@'],
                    ],
                ],
            ],
            'verbs' => [
                'class' => VerbFilter::className(),
                'actions' => [
                    'logout' => ['post'],
                ],
            ],
        ];
    }

控制器中红线部分缺少则导致验证码不显示

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